Cutout Gains or not?
Cutout Gains or not? Well this question has bothered me for too long. i dont have a dyno here locally so i cant test it. I want to know if i am making any more power through my cutout rather than my magnaflow muffler. I know the car feels more torquey through the muffler. I know the cutout would make more power if i had a cam or a power adder but i dont. (Mods in sig). Tell me what you guys think? I want to know which way i should be running the car closed through magnaflow muffer only or open cutout? Thanks
11 Second Club
Joined: Oct 2002
Posts: 1,400
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From: NY,CT & MA
they cutout will yield a better gain since its free flowing.....in your setup?? hm... i say probably 5-10RWHP tops..
i get a huge jump when i open mine....but i also run a stock muffler so its a tad different..
i get a huge jump when i open mine....but i also run a stock muffler so its a tad different..
I ran some back-back, open/closed higway pulls and
the engine delivered torque showed a pretty solid rise
but only at the top end. Like you'd expect I guess.
I think I posted those a few weeks back.
the engine delivered torque showed a pretty solid rise
but only at the top end. Like you'd expect I guess.
I think I posted those a few weeks back.
On The Tree
Joined: May 2003
Posts: 134
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From: Mckinney, TX (now) Keller, TX (soon)
When I last Dynoed my car I ran one run through the random tech exhaust and pulled 295 RWHP then opened up the cut-out and ran consecutive 323 RWHP pulls. YUP, 28 RWHP going from closed to open!!!! This was with just about everything else on the car stock except the lid and a pulley 
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TECH Apprentice
Joined: Apr 2003
Posts: 362
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From: fairfax, va
Originally Posted by 99_1LE_Z
When I last Dynoed my car I ran one run through the random tech exhaust and pulled 295 RWHP then opened up the cut-out and ran consecutive 323 RWHP pulls. YUP, 28 RWHP going from closed to open!!!! This was with just about everything else on the car stock except the lid and a pulley
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On The Tree
Joined: May 2003
Posts: 134
Likes: 0
From: Mckinney, TX (now) Keller, TX (soon)
Originally Posted by skunk50
WTF? could this be a fluke???
I have 2 cutouts in my ypipe. I picked up 6 rwhp in the last 400 rpms up top over my hooker catback. Eh...quite disappointing considering how much I spent for the custom Y and dual qtec openers.
What do you guys think of the exhaust note with the cutout open? We just had a 3" cutout (manual) installed today and to us inside the car it sounds freaking awesome with just a few rough notes...
What is your opinion regarding the sound of the LS1 through a cutout?
What is your opinion regarding the sound of the LS1 through a cutout?
I love my cutout open. The sound it makes when the car flies through the shifts due to the converter is awesome! I hate the rattle on the hatch I have at low rpms', but my foot can take care of that! I have the SLP DD, and a smaller cam, so I need the cutout to feel better about my setup
Originally Posted by Tiger2o69
I read that the ls1 likes back pressure and that the cutout might now be a good thing for low end torque. Has anyone heard anything about this?
